Both apps put privacy front and center. The difference is what "private" actually means under the hood.
Stardust became popular as a privacy-focused period tracker. Like most trackers, though, it is a cloud service: you create an account and your data is processed on its servers, which means privacy ultimately depends on the company's policies, vendors, and security holding up over time. In 2022, reporting raised questions about a third-party data-sharing practice in the app, which the company said it addressed — a reminder that with any cloud app, you are trusting a server you can't see.
Hoo-Ha takes privacy out of the "trust us" category and puts it into architecture. There is no account and no server, and the app contains no networking code at all — a build-time check fails the build if any is ever added. There is no data-sharing practice to get wrong, because there is no data leaving your phone in the first place.
| Hoo-Ha | Stardust | |
|---|---|---|
| Works 100% offline | Yes | No (cloud) |
| No account required | Yes | No |
| No networking code in the app | Yes | No |
| Data stays only on your device | Yes | Server |
| Pricing | $14.99 once | Free / subscription |
| GLP-1 tracking | Yes | No |
If you like Stardust's privacy mission but want the strongest possible version of it, Hoo-Ha is the structural answer: nothing to upload, nothing to share, nothing to subpoena — and a one-time price instead of a subscription.
Comparison based on publicly available information and may change over time. Stardust is a trademark of its owner; this page is not affiliated with or endorsed by it.